Device and method for thermal transfer using air as the working

Details Device and method for thermal transfer using air as the working Device and method for thermal transfer using air as the working

1996-02-05

1998-06-16

Kwon, John T.

Refrigeration

Air compressor, cooler and expander type

F25D 900

Patent

active

057653879

ABSTRACT:
A method is disclosed for generating a thermal difference in a working medium between an inlet and an outlet of an enclosure and transferring the thermal difference to a region being cooled. The working medium is drawn into the enclosure (45) through the inlet (76). A force is applied to compress the working medium in the enclosure with decreasing entropy in the working medium and with an input of work to the working medium. The working medium is allowed to expand through the outlet (56) with a change in entropy between zero and no greater than the magnitude of the decrease in entropy during the step of compression and with an output of work from the working medium equal to or greater than the work input to the working medium in the step of compression. Thereby, a thermal difference is caused in the working medium between the inlet and the outlet. The thermal difference is transferred to the region being cooled. An advantage of the method is a more efficient means of generating a thermal difference in a working medium.

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"Physics", Resnick et al, pp. 638-639.

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